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Joint venture, contribution amount.

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Minimum number of assets contributed to a joint venture.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Amount of cash inflow from a noncontrolling interest. Includes, but is not limited to, purchase of additional shares or other increase in noncontrolling interest ownership.

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Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

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Manufacturing Facility in Guangzhou (Details) ¥ in Thousands, $ in Thousands							3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($)	Apr. 04, 2018 CNY (¥)	May 04, 2017 CNY (¥)	Apr. 14, 2017 CNY (¥)	Apr. 13, 2017 CNY (¥)	Mar. 07, 2017 CNY (¥) Asset	Dec. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Apr. 04, 2018 USD ($)	Dec. 31, 2016 USD ($)
Organization
Capital contribution from noncontrolling interest \| $								$ 14,527
Cash, cash equivalents and restricted cash \| $	$ 470,011						$ 239,602	$ 261,006		$ 87,514
BeiGene Biologics Co., Ltd. (“BeiGene Biologics”)
Organization
Capital contribution from noncontrolling interest				¥ 100,000
GET's equity interest in BeiGene Biologics (as a percent)	5.00%					5.00%
Cash, cash equivalents and restricted cash \| $	$ 145,279
Shareholder Loan \| Convertible Debt \| Investor
Organization
Face amount				900,000		¥ 900,000
Shareholder loan				¥ 900,000
Debt instrument term (in years)				72 months
Long Term Bank Loan April 4, 2018 \| Loans Payable
Organization
Face amount		¥ 580,000							$ 87,652
Debt instrument term (in years)		9 years
Long-term debt \| $	$ 42,315
BeiGene Biologics Co., Ltd. (“BeiGene Biologics”)
Organization
Ownership percentage (as a percent)	95.00%
BeiGene Biologics Co., Ltd. (“BeiGene Biologics”) \| BeiGene (Hong Kong) Co., Limited.(“BeiGene HK”)
Organization
Cash capital contribution, agreed amount						¥ 200,000
Minimum number of biologics assets to be contributed \| Asset						1
Ownership percentage (as a percent)						95.00%	95.00%
Cash capital contribution			¥ 2,415		¥ 137,830
BeiGene Biologics Co., Ltd. (“BeiGene Biologics”) \| GET
Organization
Cash capital contribution, agreed amount						¥ 100,000
BeiGene (Shanghai) Co., Ltd. (“BeiGene (Shanghai)”)
Organization
Ownership percentage (as a percent)	95.00%
BeiGene (Shanghai) Co., Ltd. (“BeiGene (Shanghai)”) \| BeiGene (Hong Kong) Co., Limited.(“BeiGene HK”)
Organization
Ownership percentage (as a percent)							95.00%
BeiGene (Shanghai) Co., Ltd. (“BeiGene (Shanghai)”) \| BeiGene Biologics Co., Ltd. (“BeiGene Biologics”)
Organization
Ownership percentage (as a percent)							100.00%